Sewing machine



Sept. 14 1926.

J. R. OLIVER SEWING MACHINE Filed lay 9. 1924 3 Shoots-Sheet 1 Ms @W T rmv Hu W0. m K w 5 b Sept. 14 I926.

J. R.-- OLIVER SEWING MACHINE Filed May 9 1924 3 Sheets-Sheet 2lnvenTor. John R. Oliver by-;Rriw,ywia' Z1 My, ATTys'.

Sept. 14 1926.

1,599,431 J. R. OLIVER SEWING MACHINE Filed May 9 1924 v 3 Sheets-Sheet5 Fig.3.

lnvenTor. John Roliver Patented Sept. 14, 1926.

UNITED STATES e was m an em a Ma ia a sse es ae e e sie e e SH IIAQHINE-RY c m-any.- Qr 305.1 me wm aea eQQW sI-WN 9 Y A E- EWI NGivracninn,

application filed May 9,

shoe stitching machineofthe class known as. a welt-.andeturn stitchingmachine, in, Which.

the shoe insole is attached to the shoe upper,

and, in some cases, also to the welt strip.

One example of welt-and-turn-stitching .machine is shown in prior Patent1,861,952 orra'nted December 14;, 1920 to Za1eski and gchoenky, althoughthe present invention s applicable to shoe stitching or other sewingmachines ofdifierent types.

' The present invention embodies improvements pertaining more especiallyto certain of the stitching instruments shown in the prior patent,including the worl; rest or socalled bumper and the weltfeeding andapplying nieinber or'so-called back gage. The actuating means oroperating connections for these instruments include, in the'priorpatent, certain pawls or dogs cooperat ng with toothed racks, forholding the stitching instruments in proper position 'duringa certainpart of the cycle in the formation of each stitch; This form of'mechanism has proven' disadvantageous. An mproved mechanism has beendisclosed in prior application of ZaleskiSerialNuniber 580,27 6 filedAugust 7 192. 1

The principal object of the present inventionis to afford a sewingmachine in which the mechanisms and operations referred to are improvedas compared with the prior structures, and'are simple, quickacting,effective and durable. Other ob ec ts and advantages of the presentinvent on'will be explained hereinafter or will be apparent to thoseskilled in the art. To the attainment of such objects; and advantagesthe present invention consists in the novel sewing machine and the novelmechanisms. combinations, arrangements and devices herein illustrated ordescribed.

In the aceompanyi pertinent parts of a shoe stitchingniachine embodyingthe present invention.

' Fig.2 is a right elevation showing certain not seen" in ng drawingsforming a part hereof Fig. 1 is a left elevation of the 1924. serial as.712,035.

Fig. 5 is an enlarged right elevationof certain parts seen in Fig. 2.

General features of construction and operation of the sewing machine,not forming a partof the present'invention, may he ascertainedbyreference to the prior patent and application referred to, 1 and others,and

therefore are not herein illustrated except so far as convenient forthedescriptionof the present invention- I The herein illustrated machinemay com-,

prise the usual stitchingflinstruments includingthe work-rest or bumperA against which the workman holds the shoe X. during stitching, also'thechannel guide which en gages with the channel in the sole w, also'theoscillating, curved, hooked needle: C, 'ope -j a-ced' to penetrate thewelt "w, the upper y and the lip i of the insole 10, also [the looper D,opera-ted toplace the thread in the harb in the needle, also 'the threadfinger E2001 operating with the loo ei a' feedfdevice or awl, and'theback gage H against'whichthe work contacts at" certain timesiand whichalso serves as a guide and feeder'for the strip or welt. The usualtake-up -will'be under stoocl. The work-rest Ais mounted atthe forwardend of a sliding shankafland thev back gage Hat theforward end'of asimilar shank h, through "which these" two inents are actuated or'controlled.

The general operation may be as in the prior patent and application. Atthe starting pos tion of the machine both the ork.

rest and back gage are free, that is areheld forwardly by'springpressure but canyield;

rearwardly to adapt themselves to the position ofthe shoe. During theperiod inwhich the needle is retracting from the work the work-rest islocked for-ward, thus holding the work forward and resisting therearwardpull offthe' -needle. At all other times the work-rest is free andresiliently'adjusts it self according to the nianipulation'lof the shoe.The shoe of course is fed forwardly while the needle is out of the workand at" such times is. guided by the channelguide' The back gage H feedsthe welt strip "to' the stitching point. While the work isjsta-gtionary, and after being disengagedby the xneedle,-'tlie back; gageisretracted, drawing welt from the-supply, later moving forward lOU lyand laying the welt in stitching position. The retraction of the backgage isiiot until after the needle has retracted out of the work, itbeing locked forward in the meanwhile, thus assisting the work-rest tohold the shoe forward during the retraction of the needle.

The machine may comprise an upright frame wall 10 wh ch supports much ofthe mechanism and forms a bearing for the stitching shaft 11, which maybe a crank shaft having a crank 13 at the right or inner side of thewall, from which the needle and other instruments may, take theirmovement, as in the prior patent and application. 2

In the illustrated embodiment of the present invention the work-rest andback gage are controlled from asingle cam disk 15 secured to the shaftat the left of theframe wall. The disk 15 is shown as having two camgrooves, an inner one 16 and an outer one 17.

The yielding forward pressure upon the work-rest A. may be effected bya'spring 18, seen in Figs. 2 and 4. Likewise the back gage H may bepressed forwardly yieldingly by a spring 19 shown in Figs. 2 and 3. Theshanks a and h of these two members are shown slidingly fitted ingrooves formed in the right side of the frame wall, and near theirforward ends they are confined therein by an attached confining plate20.

The retraction of the back gage may be effected by the followingmechanism. A foll0wer'22 engages the cam groove 17 and is mounted on anarm 23 of a lever fulcrumed at 24 and having a downward arm 25, theextremity-26 of which constitutes a hunter, arranged to cause theretracting movements of the-shank h by striking a rearward blow againsta lug 27 projecting leftwardly from the shank. Leather washers 28 may beinterposed between the hunter 26 and the lug 27, with a pin 29 passingthrough and holding the parts in position. The timing is such that-afterthe needle has retracted and the shank it has been released it is buntedrearwardly to the proper extent so as to effect feed of welt asdescribed and to draw the back gage away from the shoe so as not todisfigure the leather during the feeding movement. The extent ofretracting movement may be adjusted through a plate 30 longitudinallyadjustable on the shank h and carrying the lug 27 I Although the backgage normally comes forward, when released, into contact with the shoe,it is desirable to have a limiting stop and for this purpose the framewall may be provided with a lug 31 recessed to contain a fiber or othercushion 32. The rear end of the shank is provided with a lug 33 whichcarries an adjustable stop screw 34, the head. 35 of which is arrangedto contact the stop cushion 32.

The thread finger E is herein shown actuating from the inner groove 16of the cam disk 15 in the following manner. A cam roller or follower 37is mounted on a cam lever 38, which is connected by link 39 with an arm40 mounted in an adjustable manner on a rock shaft 41'... An adjustingconnection 42, 43 between the link and arm permits change of throw ofthe thread finger E, which is adjustably mounted upon the shaft 41. Thethread finger cooperates with the looper in placing the thread upon thebarb of the needle.

It only rema ns to describe the means and operation for looking forwardand releasing the respective shanks of the work-rest and back gage.These operations are all controlled by the cam 16 through a follower 44mounted at the lower end of a cam lever 45 mounted on a rock shaft 46,all as seen in Fig. 1. The rock shaft passes through the frame wall 10to the opposite side, and the remaining connections are shown in Fig. 2.However, the locking devices themselves will be described first andlater the controlling connections from the rock shaft 46.

Tt will be noted that the identical cam groove 16 is used to controlboth the thread finger E and the shank locking devices. It has beenobserved that the short period in which the locking is in effect isabout a half cycle removed from the thread finger actuation, and thegroove has been adapted and arranged, through two separate followers, toeffect both operations.

The-devices forlocking forward the workrest and back gage respectivelyareof a novel form and may be designated as grip arms 43 and 49respectively. The construction is shown separately in Fig. 5. The gripmember or arm 48 or 49 is shown as a swinging member having a rounded orother blunt nose 50 adapted to contact upon and wedge against the smoothlateral surface of the shank a or it. This wedge arm is of a substantiallength and fulcrumed' at a point 51 spaced laterally away from theshank, the distance and the length of the arm being such that when thenose is brought into contact with the shank the arm is inclined onlyslightly from the normal or 90 degree position. 'The mountings are firmand solid so to give no yield. Bythis arrangement, when the grip arm isbrought into contacting position, as shown,

in Fig. 5, it affords an immediate gripping action, the shank beingpositively held against movement ina rearward direction, indicated bythearrow 52; while at the same time the device is capable of easy andquickrelease, namely by simply pulling the grip arm slightly away fromits gripping position.

The drawings show the grip members accommodated within recesses 53 inthe frame wall 10, and each member has a spring 54 two shanks may becontrolled simultaneous ly, and the connections for operating the griparms may be as follows.

The rock shaft 46 heretofore mentioned, oscillated by the cam 16,carries a clownwa-rdly extending rock lever 56. The lower extremity ofthis is connected to swing a sec- 0nd lever 57 which is fulcrumed at 58.A loose connection between the two levers is necessary and this isprovided by a block 59 pivoted on the lever 56 and engaging a slot 60 inthe lever 57 The lever 57 extends downwardly at 61, and thelowerextremityis provided with a pivot 62, connecting it to a link 63 whichextends rearwardly and at 64 is connected near the lower end of the griparm 49. The link 63 is extended for wardly beyond the pivot 62 and thiseX- tension 65 is similarly connected by a link 66 with the free end ofthe grip arm 48 by pivot 67. By this linkage a slight throw of the cam16 is capable of moving both grip members 48 and 49 simultaneously intoor out of gripping position. The same cam 16 is utilized that servesalso to actuate the thread finger E. The connecting levers and links areproportioned and arranged to give the proper throw to the grip membersat.

the proper points oftime and to the proper extent. The timing of theseoperations with respect to the retracting movements, already described,will be understood by those skilled in the art and is also made clear bythe contours of thecams herein shown. The

described mechanism for operatingv and controlling the work-rest andback gage is simple, effective, quick-actingand durable.

In order to strengthen the mountings of the shanks a and h at their rearends each of them may be provided with a confining plate 21., placedopposite to the gripping point at which the grippers 48 and 49 engage.The forward movement of the shank a may be limited by a stop pin 36contacting the forward confining plate 20.

It will thus be seen that I have described a sewing machine of the classmentioned, embodying the principles and attaining the objects andadvantages of the present invention. Since-niany matters of combination,arrangement, design, construction, and detail, may be variously modifiedwithout departing from the novel principles involved, no limitation tosuch mattersis intended except in so far as set forth'in'the appendedclaims.

iVhatis claimed is: p 1. In a shoesewing machine, the operatingshaft,and stitching:instruments oper- 'ated therefrom, in combinationwith a member, engagoable with the WOIlZ, a slidable shank carrying themember toward or from the 'work,.and means for looking forward the shankat certain per1ods,"compr1s1ng a pivoted blunt-nosed grip-arm arrangedto have-its extremity swung into locking engagement'with the slidingshank, at'a slight incline from right angles to the surface of theshank, and connections from the operating shaft to said grip armcomprising an oscillating part and a connection therefrom to the griparm operating both'tothrust the grip arm into locking position and toswing it from position, in cooperation with the stitch formingoperations. i

2. In a shoe sewingmachine, the operating shaft, andstitching'instruments operated therefrom, in combination with a memheren 'a eable with the work aslidablo I shank carrying the member towardor from u the work, and means for lOCl lI1g.l OI\VLl7Cl the shank atcertain periods, comprising a pivoted blunt-nosed grip-arm arranged tohave its extremit swun 1nto lOCklIl engagement with the sliding shank,at a slight incline from right angles to the surface of the shank, andconnections from the operating shaft to said grip arm comprising a rocklever oscillated from the shaft, and a link connection from the rocklever to the grip arm, moving the latter both to and from lookingposition' 3. In a-shoe sewing machine a work rest, 6

a back gage, sliding shanks therefor," a swlnglng grip arm for locklngeach shank forward, a rock lever, means for rocking'lt,

and connections from said lever to both grip.

arms, comp "ising linkage operating both to force the grip arms intolocking position and move them from gripping position.

4. In a shoe sewing machine a work rest, a back gage, sliding shankstherefor, a swinging grip arm for locking each shank forward, arocklever, means for rocking it, and connections from said i .ver toboth grip arms comprising a link from the rock lever to one of said griparms, and a link from said link to the'other of said grip arms.

5. In a sewing machine a member engageable with the work, and itsslidable-shank,

a needle, a'looper, a thread finger, a shaft,

and connections for operating said elements, includlng a cam surface,two followers en gaging said cam surface, connections from one followerto actuate the thread finger and connections from the other follower forlocking the shank forward.

6. In a shoe sewing machine a yielding member engaged by the shoe, ayielding shank supporting said member, a shaft, a needle, a looper, athread finger cooperating with the needle and looper, a cam actuated bysaid shaft, two independent followers engaging said cam, connectionsfrom one of such followers'to the thread finger to operate it and meansoperated from the other follower for looking forward said shank at acertain part of each stitch cycle.

7. In a shoe sewing machine a yielding member engaged by the shoe, ayielding shank supporting said member, a shaft, a

needle, a thread handling instrument cooperating with the needle, a camactuated by said shaft, two independent followers engaging said cam,connections from one of such followers to the thread handling instrumentto operate it, and means operated from the other follower for lockingforward said shank at a certain part of each stitch cycle.

In testimony whereof, I have affixed' my signature hereto.

JOHN ROGER OLIVER'

